There are 2 types of items that can be crafted: General Items (Gen) and Profession Items (Pro).
General Items are accessible to all Wizards, and are most often used to perform Ascension Rituals to level up your character or perform Home upgrades.
General Items can only be crafted by Wizards.
Profession Items are specialised recipes that are available to specific professions only. You either have to know a Wizard of that profession or use the marketplace to acquire these specialised goods.
Profession Items can only be crafted by Companions.